Categorize the following reactions: 3. N, (g) + 3H, (g) = 2NH; (g) 4. С.Н,О, (аq) -> 2C,Н.О (аq) +2С0.(g) 5. Ca (s) + Zn(NO,), (aq) --> Ca(NO,), (aq) + Zn (s) 3 2
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- c) Michael performed an experiment to analyse iron content by coulometry. A sample with mass of 0.8202 g was analysed against platinum cathode. During the reaction, 103.2775 C were required to reduce Fe(III) to Fe(II). Deduce the percentage of Fe2(SO4)3 (399.88g/mol) in this sample. (F = 96485 C/mol e¯)You are tasked with creating a pourboix diagram of selenium speciation. The relevent reactions are H2SeO3 <-> HSeO3- , HSeO3- <-> SeO32-, SeO42- <-> H2SeO3, SeO42- <-> HSeO3-, and SeO42- <-> SeO32-. Set and balence the redox reactions needed for this question and explain how you landed on those reactions.True or false? A) Calcium acetate and sodium carbonate is Ca2+(aq) + 2C2H3O2-(aq) ----> Ca(C2H3O2)2(s) B) Magnesium chloride and sodium hydroxide is Mg2+(aq) + 2OH-(aq) ----> Mg(OH)2(s) C) Sodium phosphate and potassium nitrate, no reaction occurs. D) Ammonium sulfate and barium nitrate is Ba2+(aq) + SO42-(aq) ----> BaSO4(s)
- One day in lab, while taking apart a complicated distillation apparatus, your friend Maya (an expert chemist) says this: "Metal sulfides roasted with oxygen produce the corresponding oxide and sulfur dioxide gas." Using Maya's statement, and what you already know about chemistry, predict the products of the following reaction. Be sure your chemical equation is balanced! ZnS(s) +O2(g) ->When jump-starting a car with a dead battery, the ground jumper should be attached to a remote part of the engine block. Why?Consider the equation G = -nF. What are the four terms in this equation? Why does a minus sign appear in the equation? What does the superscript o indicate?
- A 5.00 mL sample of brandy was diluted to 1.00 L in a volumetricflask. The ethanol in 25.00 mL aliquot of the diluted solution wasdistilled into 50.0 mL of 0.02000 M K2Cr2O7and oxidized to aceticacid with heating.3C2H5OH + 2Cr2O72- + 16 H+ → 4 Cr3+ + 3CH3COOH + 11 H2OAfter cooling, 20.00 mL of 0.1253 M Fe3+ was pipetted into the flask. The excess Fe2+ was then titrated with 7.46 mL of standard K2Cr2O7to a diphenylamine sulfonic acid endpoint. Calculate the percent (w/v) ethanol (MW 46.07 g/mol) in the brandy.One of the types of first generation pesticides contained arsenic. An analytical analysis for arsenic was to convert to AsO4-3 and precipitate with Ag+, yielding Ag3AsO4(s). What is the oxidation state of arsenic in this precipitate? Group of answer choices -5 -3 0 +3 +5A solution containing 0.402 49 g of CoCl2 ? xH2O (a solid with an unknown number of waters of hydration) was exhaustively electrolyzed to deposit 0.099 37 g of metallic cobalt on a platinum cathode by the reaction Co21 1 2e2¡Co1s2. Calculate the number of moles of water per mole of cobalt in thereagent. A good approach is to find moles of Co, moles of CoCl2, mass of CoCl2, and, by difference, mass of H2O in the sample.
- Pure copper may be produced by the reaction of copper(I) sulfide withexcess oxygen gas as follows:Cu2S(s) + O2(g) ---> 2Cu(s) + SO2(g)What mass of copper(I) sulfide is required in order to prepare 0.610 kg ofcopper metal?A. 0.610 kgB. 0.764 kgC. 0.305 kgD. 0.459</o:p> 23. What is the charge (oxidation state) of the cation in Hg20 (mercurous oxide)? </o:p> 24. What is the charge (oxidation state) of the cation in Cu3(PO4)2?</o:p> </o:p> Q72;</o:p> Do you think that EAP and EWP programs are a good investment for a company? Why or why not?</o:p> </o:p>Pls give with reason, the type and name of the reaction.